Logic gate into boolean equation

J

Jibbed

Guest
Hi,
Hope this is the right group for this.

I've made a big circuit in digital works that makes a 7 Segment digital
display count from 0 to 9. I now have to make the Boolean equations from the
circuit. One for each segment.

Here is the first segment (8kb):
http://www.magic-carpet.freeserve.co.uk/thb/digi_circuit.GIF

Would it be:
_ _ _ _ _ _ _ _ _ _
SEG A = A B C D + A B C D + A B C D

Or is that total crap?!

TIA,
Jon
 
"Jibbed" <jons1@SPAMMAGEmagic-carpet.freeserve.co.uk> schreef in bericht
news:bpaq93$ibm$1@newsg2.svr.pol.co.uk...
Hi,
Hope this is the right group for this.

I've made a big circuit in digital works that makes a 7 Segment digital
display count from 0 to 9. I now have to make the Boolean equations from
the
circuit. One for each segment.

Here is the first segment (8kb):
http://www.magic-carpet.freeserve.co.uk/thb/digi_circuit.GIF

Would it be:
_ _ _ _ _ _ _ _ _ _
SEG A = A B C D + A B C D + A B C D

Or is that total crap?!

TIA,
Jon
Click to expand...
Jon,

It is not total crap, but it's not correct either. Besides, the negation
lines do not come through on the right place. Below I use a notation that
fits better in a typed text.

SEG A = /(/A * /B * /C * D + /A * B * /C * /D + /A * B * C * /D)

Re-reading your equation and shifting the negation lines a little bit, I
guess it's the same that you (want to) write.

petrus




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Hi peter,
Thanks! That was what I was looking for! Never seen it written like that but
it does makes sense to me, sort of confirmed what I'd hoped. I had the
original
equation I made from the truth table which had an OR instead of a NOR that I
changed it to. I was hoping that I could just "NOT" the whole equation which
it seems like I can do.

But, I need it written in the form I have it written, which I'm hoping would
be:

http://www.magic-carpet.freeserve.co.uk/thb/equation.GIF

(note the absence of a line immediately above the OR (+). Correct?)

Anyway you've been lots of help. I just need to get cracking on the rest of
the segments now!...

Regards,
Jon

"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:Fb8ub.177099$di.40720632@amsnews02.chello.com...
"Jibbed" <jons1@SPAMMAGEmagic-carpet.freeserve.co.uk> schreef in bericht
news:bpaq93$ibm$1@newsg2.svr.pol.co.uk...
Hi,
Hope this is the right group for this.

I've made a big circuit in digital works that makes a 7 Segment digital
display count from 0 to 9. I now have to make the Boolean equations from
the
circuit. One for each segment.

Here is the first segment (8kb):
http://www.magic-carpet.freeserve.co.uk/thb/digi_circuit.GIF

Would it be:
_ _ _ _ _ _ _ _ _ _
SEG A = A B C D + A B C D + A B C D

Or is that total crap?!

TIA,
Jon




Jon,

It is not total crap, but it's not correct either. Besides, the negation
lines do not come through on the right place. Below I use a notation that
fits better in a typed text.

SEG A = /(/A * /B * /C * D + /A * B * /C * /D + /A * B * C * /D)

Re-reading your equation and shifting the negation lines a little bit, I
guess it's the same that you (want to) write.

petrus




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.532 / Virus Database: 326 - Release Date: 27-10-2003
Click to expand...
 
Jibbed wrote:
Hi peter,
Thanks! That was what I was looking for!
[]
But, I need it written in the form I have it written, which I'm hoping would
be:

http://www.magic-carpet.freeserve.co.uk/thb/equation.GIF

SEG A = /(/A * /B * /C * D + /A * B * /C * /D + /A * B * C * /D)
petrus
--------------
Click to expand...
Yes, that's he same.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
 
Phew! Good to hear.

Thanks,
Jon


"R. Steve Walz" <rstevew@armory.com> wrote in message
news:3FB984A4.4D64@armory.com...
Jibbed wrote:

Hi peter,
Thanks! That was what I was looking for!
[]
But, I need it written in the form I have it written, which I'm hoping
would
be:

http://www.magic-carpet.freeserve.co.uk/thb/equation.GIF

SEG A = /(/A * /B * /C * D + /A * B * /C * /D + /A * B * C * /D)
petrus
--------------
Yes, that's he same.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Click to expand...
 
Jon,

It's correct. The way I initially learned to write it, but, as I said, not
easy to type. Modern logic developing programs tend to use the "!" for the
NOT, "|" for the OR and "&" for the AND. Learned from the C language. You'll
met them when you continue to study digital developement.

Succes,

petrus

"Jibbed" <jons1@SPAMMAGEmagic-carpet.freeserve.co.uk> schreef in bericht
news:bpbq61$oce$1@newsg3.svr.pol.co.uk...
Hi peter,
Thanks! That was what I was looking for! Never seen it written like that
but
it does makes sense to me, sort of confirmed what I'd hoped. I had the
original
equation I made from the truth table which had an OR instead of a NOR that
I
changed it to. I was hoping that I could just "NOT" the whole equation
which
it seems like I can do.

But, I need it written in the form I have it written, which I'm hoping
would
be:

http://www.magic-carpet.freeserve.co.uk/thb/equation.GIF

(note the absence of a line immediately above the OR (+). Correct?)

Anyway you've been lots of help. I just need to get cracking on the rest
of
the segments now!...

Regards,
Jon

"petrus bitbyter" <p.kralt@hccnet.nl> wrote in message
news:Fb8ub.177099$di.40720632@amsnews02.chello.com...

"Jibbed" <jons1@SPAMMAGEmagic-carpet.freeserve.co.uk> schreef in bericht
news:bpaq93$ibm$1@newsg2.svr.pol.co.uk...
Hi,
Hope this is the right group for this.

I've made a big circuit in digital works that makes a 7 Segment
digital
display count from 0 to 9. I now have to make the Boolean equations
from
the
circuit. One for each segment.

Here is the first segment (8kb):
http://www.magic-carpet.freeserve.co.uk/thb/digi_circuit.GIF

Would it be:
_ _ _ _ _ _ _ _ _ _
SEG A = A B C D + A B C D + A B C D

Or is that total crap?!

TIA,
Jon




Jon,

It is not total crap, but it's not correct either. Besides, the negation
lines do not come through on the right place. Below I use a notation
that
fits better in a typed text.

SEG A = /(/A * /B * /C * D + /A * B * /C * /D + /A * B * C * /D)

Re-reading your equation and shifting the negation lines a little bit, I
guess it's the same that you (want to) write.

petrus




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.532 / Virus Database: 326 - Release Date: 27-10-2003
Click to expand...

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.532 / Virus Database: 326 - Release Date: 27-10-2003
 
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